1.11s (11-Aug-2004) 188.8.131.52 (2002-01-01) via .inf
Search All Kingsun SF-620 USB Infrared Adapter Drivers
Unpack the Zip to a directory. In XP plug in the IrDA unit, select "no" to checking the internet and point the directory containing the unzipped files. The driver is not digitally signed by MS so you will have to click "Continue" when prompted.